92 lines
2.4 KiB
JavaScript
92 lines
2.4 KiB
JavaScript
/**
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* The default background shader used for vision sources
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*/
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class BackgroundVisionShader extends AdaptiveVisionShader {
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/** @inheritdoc */
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static FRAGMENT_END = `
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finalColor *= colorTint;
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if ( linkedToDarknessLevel ) finalColor = mix(baseColor.rgb, finalColor, computedDarknessLevel);
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${super.FRAGMENT_END}
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`;
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/**
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* Adjust the intensity according to the difference between the pixel darkness level and the scene darkness level.
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* Used to see the difference of intensity when computing the background shader which is completeley overlapping
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* The surface texture.
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* @type {string}
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*/
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static ADJUST_INTENSITY = `
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float darknessLevelDifference = clamp(computedDarknessLevel - darknessLevel, 0.0, 1.0);
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finalColor = mix(finalColor, finalColor * 0.5, darknessLevelDifference);
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`;
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/** @inheritdoc */
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static ADJUSTMENTS = `
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${this.ADJUST_INTENSITY}
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${super.ADJUSTMENTS}
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`;
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/**
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* Memory allocations for the Adaptive Background Shader
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* @type {string}
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*/
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static SHADER_HEADER = `
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${this.FRAGMENT_UNIFORMS}
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${this.VERTEX_FRAGMENT_VARYINGS}
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${this.FRAGMENT_FUNCTIONS}
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${this.CONSTANTS}`;
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/** @inheritdoc */
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static fragmentShader = `
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${this.SHADER_HEADER}
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${this.PERCEIVED_BRIGHTNESS}
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void main() {
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${this.FRAGMENT_BEGIN}
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${this.ADJUSTMENTS}
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${this.BACKGROUND_TECHNIQUES}
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${this.FALLOFF}
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${this.FRAGMENT_END}
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}`;
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/** @inheritdoc */
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static defaultUniforms = {
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technique: 0,
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saturation: 0,
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contrast: 0,
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attenuation: 0.10,
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exposure: 0,
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darknessLevel: 0,
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colorVision: [1, 1, 1],
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colorTint: [1, 1, 1],
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colorBackground: [1, 1, 1],
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screenDimensions: [1, 1],
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time: 0,
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useSampler: true,
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linkedToDarknessLevel: true,
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primaryTexture: null,
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depthTexture: null,
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darknessLevelTexture: null,
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depthElevation: 1,
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ambientBrightest: [1, 1, 1],
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ambientDarkness: [0, 0, 0],
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ambientDaylight: [1, 1, 1],
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weights: [0, 0, 0, 0],
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dimLevelCorrection: 1,
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brightLevelCorrection: 2,
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globalLight: false,
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globalLightThresholds: [0, 0]
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};
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/**
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* Flag whether the background shader is currently required.
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* If key uniforms are at their default values, we don't need to render the background container.
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* @type {boolean}
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*/
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get isRequired() {
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const keys = ["contrast", "saturation", "colorTint", "colorVision"];
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return keys.some(k => this.uniforms[k] !== this.constructor.defaultUniforms[k]);
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}
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}
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